Surface Amination of Silica Nanoparticles Using Tris(hydroxymethyl)aminomethane

作者：Jingyuan Wang, Yang Ling, Jiuren Xie, Yichong Wang, Ting-Jie Wang · 发表于：Industrial & Engineering Chemistry Research · 年份：2020 · DOI：10.1021/acs.iecr.0c04346 · 被引用次数：23 · 研究领域：Covalent Organic Framework Applications、Silicone and Siloxane Chemistry、Membrane Separation and Gas Transport

Herein, efficient amino modification of silica (SiO 2 ) nanoparticles using tris(hydroxymethyl)aminomethane (Tris) was performed via aqueous mixing, spray drying, and thermal treatment. The hydroxymethyl and amino groups of Tris reacted with the silanol groups on the SiO 2 particle surface. Tris amination does not produce volatile organic compounds. Moreover, Tris does not condense itself and can be easily grafted in a single molecular layer on the particle surface. The grafting density of Tris reached 2.60 nm –2 . Tris amination increases the reactivity of the particle surface and significantly enhances the grafting density of stearic acid on the SiO 2 particles and the hydrophobicity of the particles.